An administrator is in charge of several remote servers in Japan. Users call and complain they cannot connect to the company’s resources located on those servers. Which of the following commands would allow the administrator to verify the servers are running？（）

单项选择题WhichofthefollowingnetworkprotocolsisneededtoensurethatuserscantypeinaFQDNinsteadoftheIPaddress？（）

A.DNS
B.FTP
C.WINS
D.IMAP4

多项选择题WhichofthefollowingarevalidpublicIPv4addresses？（）

A.10.2.127.220/16
B.127.0.0.1/24
C.212.2.17.54/16
D.9.2.128.254/8
E.127.2.126.213/24

单项选择题Auserhasasmallnetworkoffourcomputersthattheywanttoconnecttoasinglecablemodem.Whichofthefollowingdeviceswouldallowtheusertodothis？（）

A.Four port switch
B.Four port wireless router
C.Four port WAP
D.Four port hub

单项选择题Auserstatesthattheycannotaccessanetworkshareddrive.Thetechnicianhasverifiedthattheclientsnetworkcableisgood.TheIPaddressofthemachineis169.254.10.15.Whichofthefollowingisthecauseoftheproblem？（）

A.The WINS server is not resolving names properly.
B.The DNS server is not resolving names.
C.The DHCP server is out of IP address leases.
D.The hosts file is corrupted.

单项选择题EnsuringthatdataistransmittedsecurelyoveranIPnetworkisthemainpurposeof：（）

A.Telnet
B.FTP
C.SIP
D.TLS